linux_5_7: init at 5.7.1

This adds an abstraction/hack to update the latest hardened kernel
independent of linux_latest, which is required as the hardened patches
aren't immediately available ([0] currently doesn't exist).
Currently the Linux hardened patches aren't even available for 5.7 which
was released on 2020-05-31 (already 9 days ago!).
Therefore it is required to keep both linuxPackages_latest_hardened and
linuxPackages_latest_xen_dom0_hardened at 5.6 until the patches for 5.7
are released.

This abstraction makes that task more manageable but we should aim for a
better solution to resolve this or at least a cleaner and more robust
implementation (in the sense of better error messages).

[0]: https://github.com/anthraxx/linux-hardened/releases/tag/5.7.1.a

ibm-plex: 4.0.2 -> 5.0.0

nixos/gnome3: nixos-artwork -> pkgs.nixos-artwork

armadillo: 9.880.1 -> 9.900.1

avocode: 4.6.3 -> 4.6.4

taisei: 1.3 -> 1.3.1

amtk: 5.0.2 -> 5.1.1

epiphany: 3.36.1 -> 3.36.2

factorio-utils: fix recursive mod dependency resolution

factorio{,-headless}-experimental: 0.18.29 -> 0.18.30

The changes from chromiumDev (see 029a5de0839) are required for
chromiumBeta as well.

mumble: 1.3.0 -> 1.3.1

unixODBCDrivers: fix sqlite driver to link with sqlite3

nixos/manual: s/environent/environment/g in configuration.xml

hydra-unstable: 2020-04-16 -> 2020-06-01

doc: update lua documentation

victoriametrics: 1.34.7 -> 1.37.0

dgraph: 1.0.17 -> 20.03.3

Without this change, it doesn't actually link to libsqlite3.so
correctly, and so the output driver has unresolved symbols.

yabai: 3.1.1 -> 3.1.2

dtc: 1.5.1 -> 1.6.0

blueman 2.1.2 -> 2.1.3

terraria-server: 1.4.0.4 -> 1.4.0.5

Co-authored-by: Dmitry Kalinkin <dmitry.kalinkin@gmail.com>

Co-authored-by: Dmitry Kalinkin <dmitry.kalinkin@gmail.com>

slirp4netns: 1.1.0 -> 1.1.1

poetry: 1.0.5 -> 1.0.8

ghq: 1.1.0 -> 1.1.1

pythonPackages.pytest-dependency: 0.4.0 -> 0.5.1

libgen-cli: 1.0.5 -> 1.0.6

nfpm: 1.2.1 -> 1.3.1

yabai: 3.1.0 -> 3.1.1